Grass instances, Building Lightmap freezes the whole System

Development Rendering
1

Hello,

i have a question regarding the grass instances:

What amount of grass instances is the right???
I have a Landscape 15x15 quads with nothing but the moss texture in it.
When i place some grass meshes (61K) the whole system freezes up!
Why is this?

I´ve turned down the value of the lightmap resolution from 8 to 4 but this is not the bottleneck. Tried to fix this with the Cull Distance but takes no effect.
There are other Levels in the community with huge fields of tight grass till the horizon. I cant get those results and i´ve no clue why.
Can anybody help me?

Sorry for my bad english but i´m from germany.

Thanks a lot for your help in advance :slight_smile:

2

-which engine version do you use? -> use the 4.8 features
-what are your specs?
-the building process is pretty performance heavy -> add a lightmass importance volume, decrease the mesh count, simplify the material
-do you get a good performance when you use dynamic lights? -> because for large world with plenty of foilage I personally would use dynamic lights :slight_smile:

3

Hello i´ve send you a private message